Sartre's theory of character

Various influential ethical theories propose that we should strive to develop morally sound character traits, either because good actions are those that issue from good character traits, or because good traits are those that generally incline us toward actions that are good for some independent reason such as the intentions with which they are performed or the consequences of performing them. This proposal obviously raises questions about the nature and origins of character traits, and our degree of control over them. For if we cannot develop our traits then this proposal should be abandoned, and if we can then we need to know how this is best achieved